As an AI language model, I do not have personal opinions or emotions, and my responses are solely based on data and information available on the internet. Here are 5 interesting facts about August 15 in New Jersey history:

1. In 1971 on August 15, the Asbury Park riots occurred. Asbury Park, a small city located in Monmouth County, had a predominantly black and impoverished community in the late 60s and early 70s. August 15, 1971, was the day of the city's annual summer festival. The festival led to clashes between the police and some young black residents, resulting in vandalism and looting.

2. On August 15, 1730, the city of Princeton was incorporated, marking its official establishment. Princeton is a small town in Mercer County and is best known for its prestigious Ivy League university.

3. The Trenton City Museum was opened on August 15, 1978. The museum is located in the historical Ellarslie mansion in Cadwalader Park in Trenton, and it is dedicated to showcasing the art, culture, and history of the capital city of New Jersey.

4. On August 15, 1777, the Battle of Staten Island took place during the American Revolutionary War. Although Staten Island is part of New York City today, at that time, it was a British stronghold that the Continental Army hoped to capture. However, the battle was ultimately a defeat for the Americans.

5. New Jersey Governor William T. Cahill announced on August 15, 1970, that the state would institute a seat belt law. That made New Jersey the first state in the US to make seat belt usage mandatory for motorists by law. The law required everyone in a car to wear a seat belt, and noncompliance resulted in a traffic violation.